s1=<>
s1=<>
s2=<abc>
s2=<abc>
s3=<abcde>
s3=<abcde>
s4=<a>
s4=<a>
s5=<aaaaa>
s5=<aaaaa>
s6=<abc>
s6=<abc>
s7=<cde>
s7=<cde>
s8=<bcd>
s8=<bcd>
s9=<bcde>
s9=<bcde>
